CN207217705U - Lithium ion battery voltage and resistance change in-situ monitoring device - Google Patents
Lithium ion battery voltage and resistance change in-situ monitoring device Download PDFInfo
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- CN207217705U CN207217705U CN201720911401.1U CN201720911401U CN207217705U CN 207217705 U CN207217705 U CN 207217705U CN 201720911401 U CN201720911401 U CN 201720911401U CN 207217705 U CN207217705 U CN 207217705U
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- Prior art keywords
- battery
- instrument
- lithium ion
- cavity
- resistance
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 17
- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 238000007707 calorimetry Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
Abstract
The utility model discloses a lithium ion battery voltage and resistance change in-situ monitoring device, which comprises an adiabatic calorimeter, an internal resistance meter and a data recorder, wherein a cavity for installing a battery is arranged in the adiabatic calorimeter, and the output end of the internal resistance meter is connected with the data recorder through a data line; and under the state that the battery is arranged in the cavity, the testing end of the internal resistance instrument is connected with the battery in the cavity through a lead. By the detection device, in-situ acquisition of voltage and resistance data in the thermal runaway test process of the battery can be realized, and more reliable data is provided for analysis of thermal safety mechanism of the battery.
Description
Technical field
It the utility model is related to lithium battery technical field of measurement and test, more particularly to a kind of lithium ion battery voltage and resistance variations
In-situ monitoring device.
Background technology
Lithium ion battery have higher than energy, operating voltage is high, memory-less effect, have extended cycle life, environmental pollution is small etc.
Advantage.With the extensive use of lithium ion battery, the security of battery is of increased attention.Lithium ion battery is electrolysed
Liquid is generally organic combustibles, and battery can produce big calorimetric when abusing raises battery temperature, may result in positive and negative pole material
Or pyrolysis occurs inside electrolyte.When battery radiating rate is less than heat production speed, it is possible to cause battery heat to be lost
The safety issues such as control, blast.For Large Copacity, high-power large-scale Li-ion batteries piles, safety issue is then more prominent,
So the security of lifting battery is current urgent problem.But want solve the problems, such as cell safety, we must first
The failure procedure and failure mechanism of electrolytic cell, only check on these, could targetedly propose Improving Measurements.Present lithium
Battery production enterprise is tested by simulated battery thermal runaway to judge the security performance of battery, and so we are surveying can
The thermal runaway process and mechanism of battery are analyzed during examination.
Adiabatic calorimetry instrument (ARC) also known as accelerate adiabatic calorimetry instrument, the instrument can by controlling temperature synchronous with sample temperature,
Can thermal characteristics of simulated battery internal heat when having little time to scatter and disappear in exothermal reaction process, so as to the real work of electrolytic cell
Situation.ARC has the advantages that high sensitivity, thermal inertia are small, can obtain starting exothermic temperature, temperature rise speed during sample test
The data such as rate, maximum temperature, it is highly beneficial to research battery thermal runaway mechanism.But ARC can not directly obtain cell voltage and electricity
Data are hindered, but we need to judge by analyzing cell voltage and resistance variations situation when studying battery thermal runaway mechanism
Internal short-circuit of battery situation, therefore, cell voltage and resistance data are necessary during acquisition thermal runaway.
Utility model content
Based on technical problem existing for background technology, the utility model proposes a kind of lithium ion battery voltage and resistance to become
Change in-situ monitoring device.
The utility model proposes a kind of lithium ion battery voltage and resistance variations in-situ monitoring device, including adiabatic calorimetry
Instrument, internal resistance instrument and data logger, adiabatic calorimetry instrument inside are provided with the cavity of installation battery, and the output end of internal resistance instrument passes through data
Line connects data logger；In cavity in the state of installation battery, the test lead of internal resistance instrument passes through the electricity in wire connection cavity
Pond.
Preferably, there is threading hole on the cavity wall of adiabatic calorimetry instrument, the battery in adiabatic calorimetry instrument cavity passes through
Wire is connected with the test lead of internal resistance instrument.
Preferably, data logger includes display unit.
Preferably, data logger uses computer.
The utility model proposes a kind of lithium ion battery voltage and resistance variations in-situ monitoring device, in order to study battery
Thermal runaway process and failure mechanism, mesuring battary is placed in adiabatic calorimetry instrument and tests its thermal runaway situation, the inspection of internal resistance instrument
Survey end to be directly connected with battery by wire to monitor voltage and resistance variations situation during battery testing, use data logger
Record the cell voltage and resistance data of internal resistance instrument acquisition in real time by data wire, package unit can realize that lithium ion battery heat is lost
Voltage and resistance variations in-situ monitoring in test process are controlled, more structurally sound data are provided for battery thermal runaway Analysis on Mechanism.
Brief description of the drawings
Fig. 1 be the utility model proposes lithium ion battery voltage and resistance variations in-situ monitoring device connection diagram；
Fig. 2 is the lithium ion battery thermal runaway temperature profile of the present embodiment；
Fig. 3 be the present embodiment lithium ion battery thermal runaway during voltage resistance change curve.
Embodiment
Reference picture 1, the utility model proposes a kind of lithium ion battery voltage and resistance variations in-situ monitoring device, including
Adiabatic calorimetry instrument 1, internal resistance instrument 4 and data logger 6.The inside of adiabatic calorimetry instrument 1 is provided with the cavity of installation battery 2；Pacify in cavity
In the state of packed battery, the test lead of internal resistance instrument 4 is used to detect the test process of battery 2 by the battery 2 in the connection cavity of wire 3
The situation of change of middle voltage and resistance.
The output end of internal resistance instrument 4 connects data logger 6 by data wire 5, so that data logger 6 obtains internal resistance instrument 4
The voltage and resistance of the battery 2 detected simultaneously record in real time, so as to obtain the delta data of the voltage of battery 2 and resistance.This reality
Apply in mode, have threading hole on the cavity wall of adiabatic calorimetry instrument 1, the battery in the cavity of adiabatic calorimetry instrument 1 directly passes through
Wire 3 is connected with the test lead of internal resistance instrument 4, and the contact resistance that can thus avoid other transfer connect bands from influences, to carry
High measurement accuracy.
In present embodiment, data logger 6 includes display unit, and specifically, data logger 6 uses computer.
In present embodiment, in order to solve the problems, such as that ARC can not obtain cell voltage and resistance data, using internal resistance instrument come
Directly test cell voltage and resistance.It is longer that battery thermal runaway tests the general cycle, it may be necessary to and 2-3 days, if so to obtain
The consecutive variations process of cell voltage and resistance must just realize the real-time monitorings of data, therefore, internal resistance instrument is passed through into data
Line is connected with data logger, and data measured is directly monitored by data logger, to realize in battery thermal runaway test process
The in-situ monitoring of voltage and resistance variations.
It can be seen that by the detection means, can be achieved to the original position of voltage and resistance data in battery thermal runaway test process
Obtain, more structurally sound data are provided for the thermally safe Analysis on Mechanism of battery.
Concrete operations of the test case to above monitoring device below in conjunction with cobalt acid lithium battery are illustrated.
Reference picture 2, it is that adiabatic calorimetry instrument tests temperature versus time curve during obtained battery thermal runaway,
It can be seen that battery in 84.7 DEG C of entrance from exothermic phase, therefore battery from Exotherm Onset Temperature TonsetFor 84.7
℃.Subsequent adiabatic calorimetry instrument no longer heats to battery, and battery temperature rise is all due to that inside battery reaction heat production causes,
When battery temperature is increased to 153 DEG C, battery is brought rapidly up up to thermal runaway, therefore the thermal runaway temperature T of battery occursTRFor
153 DEG C, the maximum temperature rise T after battery thermal runawaymaxFor 289 DEG C.
Fig. 3 is the situation of change of voltage resistance during battery thermal runaway.It can be seen that battery temperature reaches
At 140 DEG C or so, cell voltage rapid decrease, cell resistance quickly raises, and illustrates under this temperature conditions, inside battery reaction
Acutely and aerogenesis, distance increases between inside battery pole piece is caused after aerogenesis, and interface is deteriorated, and battery producing gas consumption electrolyte,
These can all cause cell resistance quickly to raise.Because aerogenesis influences, microbubble may result in local open circuit inside pole piece, separately
Outside, reaction, these factors such as negative pole end consumption lithium ion can all cause voltage rapid decrease, after cell reaction balance, voltage
Slightly recover.Before battery thermal runaway, because internal short-circuit occurs, cell resistance declines, and voltage also begins to decline, battery thermal runaway
Voltage is directly reduced to 0V afterwards.The utility model provides voltage and resistance in a set of in-situ monitoring battery thermal runaway test process and become
The device of change, thermal runaway experiment is carried out to battery by above example, it was demonstrated that the workability and reasonability of the device.Cause
This, the present apparatus has great application prospect in research lithium ion battery thermal runaway mechanism field.It is described above, it is only this practicality
New preferable embodiment, but the scope of protection of the utility model is not limited thereto, it is any to be familiar with the art
Technical staff in the technical scope that the utility model discloses, according to the technical solution of the utility model and its utility model structure
Think of is subject to equivalent substitution or change, should all cover within the scope of protection of the utility model.
Claims (4)
1. a kind of lithium ion battery voltage and resistance variations in-situ monitoring device, it is characterised in that including adiabatic calorimetry instrument (1),
Internal resistance instrument (4) and data logger (6), are provided with the cavity of installation battery (2) inside adiabatic calorimetry instrument (1), internal resistance instrument (4) it is defeated
Go out end and data logger is connected by data wire (5)；In cavity in the state of installation battery, the test lead of internal resistance instrument (4) passes through
Battery in wire (3) connection cavity.
2. lithium ion battery voltage as claimed in claim 1 and resistance variations in-situ monitoring device, it is characterised in that thermal insulation amount
The cavity wall of hot instrument (1) is provided with threading hole, the battery (2) in adiabatic calorimetry instrument (1) cavity by wire (3) with it is interior
Hinder the test lead connection of instrument (4).
3. lithium ion battery voltage as claimed in claim 1 or 2 and resistance variations in-situ monitoring device, it is characterised in that number
Include display unit according to recorder (6).
4. lithium ion battery voltage as claimed in claim 3 and resistance variations in-situ monitoring device, it is characterised in that data are remembered
Record instrument (6) uses computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720911401.1U CN207217705U (en) | 2017-07-26 | 2017-07-26 | Lithium ion battery voltage and resistance change in-situ monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720911401.1U CN207217705U (en) | 2017-07-26 | 2017-07-26 | Lithium ion battery voltage and resistance change in-situ monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207217705U true CN207217705U (en) | 2018-04-10 |
Family
ID=61814023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720911401.1U Active CN207217705U (en) | 2017-07-26 | 2017-07-26 | Lithium ion battery voltage and resistance change in-situ monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207217705U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855736A (en) * | 2020-03-18 | 2020-10-30 | 同济大学 | Electricity card performance test system |
| CN111929597A (en) * | 2020-07-16 | 2020-11-13 | 中国汽车技术研究中心有限公司 | Battery resistance testing method and device in battery thermal runaway process |
-
2017
- 2017-07-26 CN CN201720911401.1U patent/CN207217705U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855736A (en) * | 2020-03-18 | 2020-10-30 | 同济大学 | Electricity card performance test system |
| CN111855736B (en) * | 2020-03-18 | 2022-02-18 | 同济大学 | Electricity card performance test system |
| CN111929597A (en) * | 2020-07-16 | 2020-11-13 | 中国汽车技术研究中心有限公司 | Battery resistance testing method and device in battery thermal runaway process |
| CN111929597B (en) * | 2020-07-16 | 2022-06-17 | 中国汽车技术研究中心有限公司 | Method and device for testing battery resistance in battery thermal runaway process |
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